HP-UX Host Intrusion Detection System Version 4.2 Administration Guide

3. If you must transmit alert information to another system, set up your own secure
communication process.
4. If a response program has its setuid or setgid bit set, it runs as that effective user or
group. It is a good practice to restrict setuid and setgid programs to the absolute minimum
necessary. For more information, see “Writing Privileged Response Programs” (page 167).
5. When a response program is started, the agent process provides it with a set of environment
variables listed in Table B-9, and passes the alert information as program arguments listed
in Table B-1. Tables B-1 to B-6 for the alert information passed as arguments 0 through 9 for
each template.
Table B-1 Additional Arguments Passed to Response Programs for Kernel Template Alerts
DescriptionAlert Value/FormatAlert Field TypeAlert FieldResponse
Program
Argument
System call number that triggered
the alert. Corresponds to a number
defined in scall_define.h.
<syscall#>
IntegerSystem Call #
argv[10]
Process ID (pid) of the attacker
<pid>
IntegerAttacker
Process ID
argv[11]
Parent process ID (ppid) of the
attacker
<ppid>
IntegerAttacker Parent
Process ID
argv[12]
User ID (uid) of the attacker
<uid>
IntegerAttacker User
ID
argv[13]
Group ID (gid) of the attacker
<gid>
IntegerAttacker Group
ID
argv[14]
Effective user ID (euid) of the
attacker
<euid>
IntegerAttacker
Effective User
ID
argv[15]
Effective group ID (egid) of the
attacker
<egid>
IntegerAttacker
Effective Group
ID
argv[16]
Full pathname of the file under
attack
<full pathname>
StringPathname of
Target File
argv[17]
File type of the file under attack.
Corresponds to an enum vtype
value defined in vnode.h.
<type>
IntegerTarget File Type
argv[18]
Mode of file under attack
<mode>(decimal)
IntegerTarget File
Mode
argv[19]
Owner of the file (uid) under attack
<uid>
IntegerTarget File
Owner
argv[20]
Group of the file (gid) under attack
<gid>
IntegerTarget File
Group
argv[21]
Inode number of the file under attack
<inode>
IntegerTarget File
Inode
argv[22]
Device number of the file under
attack
<device>
IntegerTarget File
Device
argv[23]
Full pathname of the attack program
<full pathname>
StringPathname of
attack program
argv[24]
File type of the attack program.
Corresponds to an enum vtype
value defined in vnode.h.
<type>IntegerAttack Program
Type
argv[25]
How Automated Response Works in HP-UX HIDS 161